<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 进度条 -->
      <el-steps
        align-center
        style="margin:20px 0"
        :space="200"
        :active="parseInt(activeIndex)"
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 填写tab -->
      <el-form
        :model="addForm"
        :rules="addRules"
        ref="addRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane
            name="0"
            label="基本信息"
          >
            <el-form-item
              prop="goods_name"
              label="商品名称"
            >
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item
              prop="goods_price"
              label="商品价格"
            >
              <el-input
                v-model="addForm.goods_price"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              prop="goods_weight"
              label="商品重量"
            >
              <el-input
                v-model="addForm.goods_weight"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              prop="goods_number"
              label="商品数量"
            >
              <el-input
                v-model="addForm.goods_number"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item
              label="商品分类"
              prop="goods_cat"
            >
              <el-cascader
                clearable
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderProps"
                :show-all-levels="false"
                @change="handelChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            name="1"
            label="商品参数"
          >
            <!-- 商品参数展示 -->
            <el-form-item
              v-for="(item) in manyTabData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="param"
                  v-for="(param,i) in item.attr_vals"
                  :key="i"
                >
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 动态属性 -->
          <el-tab-pane
            name="2"
            label="商品属性"
          >
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            name="3"
            label="商品图片"
          >
            <el-upload
              class="upload-demo"
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button
                size="small"
                type="primary"
              >点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane
            name="4"
            label="商品内容"
          >
            <quill-editor
              v-model="addForm.goods_introduce"
              ref="myQuillEditor"
              @blur="onEditorBlur($event)"
              @focus="onEditorFocus($event)"
              @ready="onEditorReady($event)"
            >
            </quill-editor>
            <el-button
              class="addBt"
              type="primary"
              @click="addGoods"
            >添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
      title="预览"
      :visible.sync="dialogVisible"
      width="50%"
    >
      <img
        :src="previewPath"
        alt=""
        class="previewImg"
      >
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      // 添加信息表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      // 配置选项
      cascaderProps: {
        expandTrigger: 'hover',
        checkStrictly: false,
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      addRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 分类列表
      cateList: [],
      // 添加商品的属性列表
      manyTabData: [],
      onlyTabData: [],
      // 图片上传路径
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 设置文件上传请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览路径
      previewPath: '',
      dialogVisible: false
    }
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类列表失败')
      }
      // console.log(res.data)
      this.cateList = res.data
    },
    handelChange () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // tab切换前的回调函数。
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClick () {
      // console.log(this.activeIndex)
      switch (this.activeIndex) {
        case '1':
          {
            const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
              { params: { sel: 'many' } })
            if (res.meta.status !== 200) {
              return this.$message.error('获取数据失败')
            }
            res.data.forEach(item => {
              item.attr_vals = item.attr_vals.length !== 0 ? item.attr_vals.split(',') : []
            })
            this.manyTabData = res.data
            // console.log('1', this.manyTabData)
          }
          break
        case '2':
          {
            const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,
              { params: { sel: 'only' } })
            if (res.meta.status !== 200) {
              return this.$message.error('获取数据失败')
            }
            // res.data.forEach(item => {
            //   item.attr_vals = item.attr_vals.length !== 0 ? item.attr_vals.split(',') : []
            // })
            this.onlyTabData = res.data
            // console.log('2', this.onlyTabData)
          }
          break

        default:
          break
      }
    },
    // 处理预览操作
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.dialogVisible = true
    },
    // 删除前处理
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(e => {
        return e.pic === filePath
      })
      this.addForm.pics.splice(i, 1)
    },
    // 上传成功后处理
    handleSuccess (response) {
      this.addForm.pics.push(response.data.tmp_path)
      // console.log(this.addForm)
    },
    // 富文本编辑器监听方法
    onEditorBlur (event) {

    },
    onEditorFocus (event) {

    },
    onEditorReady (event) { },
    // 商品添加提交
    addGoods () {
      this.$refs.addRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请正确填写添加内容')
        }
        // console.log(this.addForm)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 修改表单的数据格式，符合请求参数标准
        this.manyTabData.forEach((item) => {
          const obj = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          form.attrs.push(obj)
        })
        this.onlyTabData.forEach((item) => {
          const obj = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          form.attrs.push(obj)
        })
        // console.log(form)
        // 发送请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        // console.log('3', res.data)
        return this.$router.push('/goods')
      })
    }
  },
  created () {
    this.getCateList()
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 5px 20px;
}
.el-checkbox {
  margin: 0 20px !important;
}
.el-form-item {
  margin: 0 0 10px 20px;
}
/deep/ .el-form-item__label {
  padding: 0 !important;
}
.previewImg {
  width: 100%;
}
/deep/ .ql-editor {
  min-height: 300px;
}
.addBt {
  margin-top: 20px;
  float: right;
}
</style>
